Automatic shifting-weight scale.



PATENTED APR. 26, 1904. G. SGHENGK. AUTOMATIC SHIFTING WEIGHT SCALE.

APPLICATION FILED JULY 25, 1903.

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PATENTED APR. 26, 1904.

I 0.. SOHENGK, I AUTOMATIC SHIFTING WEIGHT SCALE.

APPLIOATION FILED JULY 25, 1903.

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N0 MODEL.

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PATBNTED APR. 26, 1904.

. 0. SGHENGK. AUTOMATIC SHIFTING WEIGHT SCALE.

APPLICATION TILED JULY 25, 1903.

3 SHEETS-SHEET 3.

N0 MODEL.

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, shifting-weight scales was restricted to the Patented April 26, 1904.

UNITED STATES PATENT CARL s HENGKQOQF DARMSTADT, GERMAN AUTOMATIC. SHIFTINGI-WEIGHT SCALE.

SPECIFICATION forming part-of Letters Patent No. 758,388, dated April 26, 1904.

Application filed m 25,1903. Serial No. 167,019. (No no'del.)

To all whont it may concern:

Be it known that I, CARL SCH ENGK, commercial counselor, a subject of the Grand Duke of Hesse, residing at 3 Wendelstadtstrasse,

Darmstadt, in the Grand Dukedom of Hesse,

German Empire, have invented certain new and useful Improvements in Automatic Shifting-Weight Scales, of which the following is:

a specification. Y n

This lnvention has reference to improvements in'automatic shifting-weight scales; and

furthermovement of the shifting weight beyond the point of equilibrium, the said escapev ment retarding the movement of the shifting,

the ratchet-pawl.

weight and allowing the gentle engagement of 'Heretofore the employment of self-acting up to the maximum: capacity of the scales, the

weighingoi' loads the weight of Which variesi within certain limits only. By the improve-i -ment constituting the subject of this inven? tion, however, loads may beweighed from Zero f weighing requiring not more time than heretofore and being just as exact. The invention consists, essentially,

rangement whereby the movement of the'shifting weight is retarded in'the proximity of the 1:

position of equilibrium and in the throwing]; in operation of'a revoluble ratchet-wheel, so;

that the above-mentioned arrangement 'is in;

strurnental bringing abouta gentle'and certain engagement of the ratchet-pawl with the,

ratchet-wheel. Instead of a revoluble ratchet- 5 which would become too long, even with very ,wheel a rack-bar has been used heretofore,-

delicate graduation, if it should be required,

to indicate only one-thousandth of the weight of the load. In revolu ble ratchet-wheels, howi ever, the number ofthe stopping-points is.

equal to the product of the number of teeth of the ratchet-wheel and of the number of revolutions.

In the drawings a preferred form of the arrangement according to the present invention is shown by Way of example.

Figure 1 shows the device in plan View. Fig. 2 is a section on the line A A of Fig. 1. Fig. 3 isa section on the line B B of Fig. 1. Fig. 4 is a section on the line C O of Fig; 1 in the'position of equilibrium. Fig. 5 is a section on the line D D of Fig. 1. Fig. 6 is a section on the line'E Eot Fig. 1. v

The balance-beanie is supported by the cen- 1 ter knives a and is provided ata suitable distance from the latter with two knives f, to

' which the load becomes operativelyattached by means of the two hangers lb, Fig. 2. Upon the balance-beama shifting weight g is arranged, the bottom side of which is provided with teeth engaging with the gear-wheel a.

Therotatingpoin t of the knife a is exactly in the center of the pitch-line of the wheel .2. The gear-wheels is mounted on the shaftw,

which is driven by any suitable gear, a loaded bar 7), which-is provided with teeth on both sides, being usedin the present instance. A

gear-wheel 2 transmits the movement from therack bar b tothe shaft w, Figs. 1, 4 and 5. After the weighing has been eifectedthe driving mechanism is returned to its initial position either-' by hand or by the weight of the dropping load. In the present instance this is eif'ccted by the levers '70 and Z, which aremo'untcdion the shaft L0 'To'the latter in an ar-=' is also keyed, a toothed segment Figs. 1,3, and4, which engages with a toothed wheel .2 on the shaft 21;, which in its turn transmits the movement to the'weighted bar I) by means of the gear-wheel 2 v v The mechanism for operating the shifting weight is connected toan escapement mech anismjwhichin the present instance consists of a pendulum and an escapement-wheel. Any other suitable escapement may also be used instead of this-mechanism. The escapement .wheel .5, which engages with the weighted bar 6, is effected by the loose gear-wheel upon the rotation of the two-armed lever 41, connected thereto.

ase embraces the pendulum 00,,which The device for effecting the engagement of the escapement mechanism comprises a weight t, Figs. 3 and 4, which is suspended from the knives a of the extremity a of the scale-beam. Upon the rotation of the scale-beam the weight t can act upon the two-armed lever o, whereupon the latter is capable of being rotated until the gear 2 becomes engaged with 2 and 2. In this position the lever e is resting against the stop The transmission of movement of the shifting weight upon the revoluble ratchet-wheel .2" is effected by the gear-wheel .2 upon the shaft w, which engages with the gear-wheel 2 keyed to the shaft 011 together with the gear-wheel 2". From the shaft of movement is furthertransmitted, by means of the gearwheel 2, to the dial or indicator-disks 2- e by the medium of the intermediate wheels 2' 2 2 (Figs. 1 and 2,) which are mounted upon the shafts Q03 10* 4.0

The stopping of the revoluble ratchet-wheel .2" is efiected by the system of levers 012 q, which are connected to the scale-beam and to the hook a, which engages with the ratchetwheel .2 in case the scale-beam after the position of equilibrium has been reached continues its rotation, and thereby effects the movement of the system of the levers 0 p q with the hook n.

The operation of the device may be described as follows: Upon the release of the driving mechanism the shifting weight y will move along the scale-beam e from left to right until the ratchet-pawl becomes engaged and the movement is thereby interrupted. The shifting will take place very quickly as long as the driving mechanism is not connected with the escapement mechanism, and it will only be retarded after this connection has been effected. The movement of the shifting weight begins at a point which corresponds to the position of equilibrium of the unloaded scalebeam with the additional weight 25 mounted thereon. If the load is suspended from the knives f and the driving mechanism of the shifting weight is made to operate, the shifting weight is moved up to a point of the scalebeam in which the equilibrium is restored. The now ensuing rotation of the scale-beam will cause the pressure which the additional weight t produces upon the right-hand end of the scale-beam to be suddenly taken off, and the weight on the scale-beam is thereby somewhat lessened. This causes the shifting weight g to continue its movement, but with a reduced speed as compared with its former movement, inasmuch as the load of the additional weight 6, which has been taken off from the scale-beam, has now caused the engagement of an escapement mechanism with the driving mechanism of the shifting weight.

Upon the now ensuing movement of the parts beyond the point of equilibrium the ratchetpawl a, connected to the scale-beam, is able to drop into engagement with the ratchetwheel gently and securely in consequence of the slow movement of the ratchet-wheel.

What 1 claim, and desire to secure by Letters Patent of the United States, is i 1. The combination of a scale-beam, a shifting weight carried by said beam, means for shifting said weight along the beam, a second weight connected to the scale-beam opposite theload, means for releasing the second weight when the point of equilibrium is attained, escapement mechanism, and an engagement mechanism for the escapement mechanism operated by the movement of the second weight for causing the retarding of the shifting weight by the escapement mechanism.

2. The combination of apivotcd scale-beam, a shifting weight on said beam, driving mechanism for actuating said shifting weight,

means for releasing the driving mechanism to permit the shifting of the weight relative to the beam, an escapement mechanism including a pendulum, and an escapement-wheel, a connection between the weight operating mechanism and the escapement mechanism, and means for operating the escapement mechanism to cause the latter to retard the movement of the shifting weight.

3. The combination of a scale-beam, ashifting weight thereon, means for shifting said weight along the beam with a relatively quick movement, means for reducing the speed of movement of the weight before it has reached the limit 'of its movement, and means for checking entirely the movement of the weight.

4. The combination of a scale-beam, a shifting weight thereon, said weight having a serrated or toothed surface, a gear-wheel engaging with the toothed surface of the weight, means for imparting motion to the gear-wheel to cause the movement of the weight, and means for reducing the speed of movement of the weight before it has reached the limit of its movement along said beam.

5. The combination of a scale-beam, a shifting weight thereon,means for imparting movement to said weight, and means for reducing the speed of movement of the weight, said latter means including an escapement mechanism, and a second weight for assisting in putting the escapement mechanism into operation, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

CARL SCHENCK. Witnesses:

WALTER HAUsINe, WALTER SCI-IUMANN. 

